Stardate not given: The Bajoran Tahna Los is beamed into DS9 after narrowly evading a pursuing Cardassian warship. Tahna belongs to the Khon-ma, a particularly ruthless terrorist group, and now seeks political asylum. Major Kira, who knows Tahna from her time in the resistance, supports the request in any way possible, acting against Commander Sisko. In the interim the two renegade Klingon sisters from the House of Duras, Lursa and B'Etor, have arrived on the station and meet with Tahna. He tries to enlist Kira's assistance to obtain a runabout but does not reveal his motive. His yet unknown goal is to detonate a bilitrium explosive, which he plans to purchase from the Duras sisters, to seal the entrance to the wormhole, and therefore eliminate the need for a Federation presence on Bajor. But the Duras sisters plan to double-cross Tahna and to deliver him to the Cardassians for a price. Sisko reluctantly allows Kira to accompany Tahna to the rendezvous with the Klingon sisters in the hope of revealing his intended target. Although Tahna manages to briefly elude Sisko and O'Brien, his plan is thwarted when Kira seizes control of the runabout, enters the wormhole, and detonates the device in the Gamma Quadrant.

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